Here is your test.
If all of your vehicle lights work, just trailer having problems, test in following manor.
White wire, strip end bare, this will be your common wire, as it is ground.
Clip alagator clip of test light to white wire, with no lights on, probe all other wires, no volage = ok
Turn on parking lights, Probe brown wire. Voltage = ok. Turn off lights
Have assistant push brake. Probe yellow and green, both should have voltage. Probe brown No voltage. Have assistant let off brake.
Turn on ignition, Left turn on- probe Yellow. Intermitant volts good, steady or no volts bad
Right turn- Probe Green. Intermitant voltage good, steady or no volt bad.
IF all vehicle lights work, but no or bad signals on vehicle to trailer connector, replace vehicle side of trailer harness. They sell plugin kits for most vehicles, so no splice required. If all test fine on test harness, re-wire trailer using following as refrence.
Green = Right stop/turn
Yellow = Left stop/turn
Brown = side/rear marker/tail/licence plate
white = Ground to trailer.
This vehicle didnt have seperate fuses for trailer lights. If the aftermarket harness did have fuses, they are VERY close to the connector.
If this helpped you, please leave me positive feedback. It took a lot out of me researching and typing this all one handed.
Sunday, July 29th, 2007 AT 5:45 PM